pinebuds/utils/crc16/crc16.h

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2022-08-15 04:20:27 -05:00
/*
* crc16.h - CRC-16 routine
*
* Implements the standard CRC-16:
* Width 16
* Poly 0x8005 (x^16 + x^15 + x^2 + 1)
* Init 0
*
* Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#ifndef __CRC16_H
#define __CRC16_H
extern unsigned short const crc16_table[256];
#ifdef __cplusplus
extern "C" {
#endif
unsigned short _crc16(unsigned short crc, const unsigned char *buffer, unsigned int len);
#ifdef __cplusplus
}
#endif
static inline unsigned short crc16_byte(unsigned short crc, const unsigned char data)
{
return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];
}
#endif /* __CRC16_H */